Lightweight castle nut - Spikes Tactical Lightweight Chromoly Castle Nut

Excellent fit and finish at an economical price. I purchased this to replace an aluminum castle nut on a light weight build. It is way sturdier than the 6061 or 7075 available. The only other lightweight option is V7 but I am glad I went this route. For the price and weight difference you can’t beat it. The threads fit perfectly with my smoke composites carbon buffer tube, 2A armament, Aero Precision enhanced, and Vltor A5. The black nitride is well done and the lightning cuts are a nice touch. If you are in the market for light weight but don’t want to compromise strength give this castle nut a try!